If a team was in every way a static entity, then you would just look at the season win-loss record and who was left to play (and their records) and the probability you'd get would be the best available predictor. I assume FG and ESPN do something like that. But we know a team is not a static entity. The personnel is always in flux, and the players themselves go through arcs of injury and health, some of which never even become public. Some young players are in a real process of getting better over the course of a year, maybe an older one irreversibly starts to break down. So the art of handicapping in large part turns on how far back do you want to go to get the 'best' estimate of a team's likely winning rate over the next X games. The further back you go, the stronger the statistical 'power' in the estimate, but the more your assumption that you are looking at the 'same' team all across the sample may be breaking down. If you take the whole season, since their records are exactly equal the best estimate would be the Twins and Tigers will win the same number of games of the next 9 so Minny end up winning by the tie-breaker (ignoring the difference in the quality of the opposition just for the sake of outlining the argument). If you look from the ASB, the Tigers would be slightly favored. If you look at the last 30, the Tigers would be clearly favored.
Pay your money and take your choice! (if you like to gamble that is.......)
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